602 results match your criteria description 18s


New Glomeromycotan Taxa, sp. nov. and gen. nov. et sp. nov. From Brazil, and gen. nov. From New Caledonia.

Front Microbiol 2021 23;12:655910. Epub 2021 Apr 23.

Departamento de Botânica e Zoologia, Universidade Federal do Rio Grande do Norte, Natal, Brazil.

Examination of fungal specimens collected in the Atlantic rain forest ecosystems of Northeast Brazil revealed many potentially new epigeous and semihypogeous glomerocarp-producing species of the phylum Glomeromycota. Among them were two fungi that formed unorganized epigeous glomerocarps with glomoid spores of almost identical morphology. The sole structure that distinguished the two fungi was the laminate layer 2 of their three-layered spore wall, which in spores of the second fungus crushed in PVLG-based mountants contracted and, consequently, transferred into a crown-like structure. Read More

View Article and Full-Text PDF

An integrative description of Diploechiniscus oihonnae/ (Richters, 1903) population from near the original type locality in Merok (Norway).

Zootaxa 2021 Apr 21;4964(1):zootaxa.4964.1.4. Epub 2021 Apr 21.

Department of Animal Taxonomy and Ecology, Faculty of Biology, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 6, 61-614 Poznań, Poland..

In the present study, we used integrative taxonomy to describe a population of Diploechiniscus oihonnae (Richters, 1903) from the neotype locality in Merok (Norway). We found no differences in the chaetotaxy formula between the life stages and sex of Dpl. oihonnae. Read More

View Article and Full-Text PDF

Molecular characterization of free-living nematodes from Kermadec Trench (Nematoda: Aegialoalaimidae, Xyalidae) with description of emAegialoalaimus/em emtereticauda/em n. sp.

Zootaxa 2021 Mar 25;4949(2):zootaxa.4949.2.7. Epub 2021 Mar 25.

National Institute of Water and Atmospheric Research (NIWA) Ltd, Wellington, New Zealand.

The Kermadec Trench is the world's fifth deepest trench and extends from approximately 26 to 36°S near the northeastern tip of New Zealand's North Island. Here, we describe a new species of Aegialoalaimus, a nematode genus with unusual buccal cavity and pharynx morphology, from a site at 9540 metres water depth in Kermadec Trench, and provide the first SSU and D2-D3 of LSU sequences for Aegialoalaimus, Manganonema, Metasphaerolaimus constrictus and Daptonema amphorum. Aegialoalaimus tereticauda n. Read More

View Article and Full-Text PDF

New insights on the diversity of Brazilian anuran blood parasites: With the description of three new species of (Apicomplexa: Hepatozoidae) from Leptodactylidae anurans.

Int J Parasitol Parasites Wildl 2021 Apr 24;14:190-201. Epub 2021 Feb 24.

Setor de Parasitologia, DBBVPZ, Instituto de Biociências, Universidade Estadual Paulista- UNESP, Distrito de Rubião Junior, Botucatu, São Paulo, Brazil.

The Amphibia are considered the most threatened vertebrate class globally, yet in Brazil they are also one of the more diverse and species rich groups. Although, in recent years there has been strong focus on amphibian related research, their parasites have not received the same attention. In Brazil, only a single species of , namely (Lesage, 1908) Pessoa, 1970, has been described from anuran hosts. Read More

View Article and Full-Text PDF

Morphological and molecular description of a new species of Isospora (Apicomplexa) from a New Holland honeyeater (Phylidonyris novaehollandiae).

Parasitol Int 2021 Apr 16;83:102348. Epub 2021 Apr 16.

Vector and Waterborne Pathogens Research Group, Harry Butler Institute, Murdoch University, Murdoch 6150, Western Australia, Australia.

A new Isospora species is described from New Holland honeyeaters (Phylidonyris novaehollandiae). Sporulated oocysts (n = 25) were characterised as subspheroidal, 29-32 × 28-31 (29.8 × 29. Read More

View Article and Full-Text PDF

Morphological and molecular characterization of Chitwood, 1957 (Dorylaimida: Leptonchidae) from Florida, with the first molecular study of the genus.

J Nematol 2021 20;53. Epub 2021 Mar 20.

Florida Department of Agriculture and Consumer Services, DPI, Nematology Section, P.O. Box 147100, Gainesville, FL, 32614-7100.

A population of , recently collected under the canopy of associated live oak trees in north Florida, was studied and described with an integrative approach, including the first molecular study of the genus. This Florida population is characterized by its 2.30 to 3. Read More

View Article and Full-Text PDF

Taxonomy and okadaic acid production of a strain of Prorocentrum lima (Dinophyceae) isolated from the Bay of Bengal, North Indian Ocean.

Toxicon 2021 Jun 26;196:32-43. Epub 2021 Mar 26.

Division of Applied Phycology and Biotechnology, CSIR-Central Salt & Marine Chemicals Research Institute, Gijubhai Badheka Marg, Bhavnagar, 364002, Gujarat, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India. Electronic address:

Prorocentrum lima (CSIRCSMCRI005) was isolated from the coastal seawater of Thonithurai, Tamil Nadu, India. Morphology of the isolate was studied using light microscopy (LM) and scanning electron microscopy (SEM) while phylogenetic analyses of the internal transcribed spacer region (ITS1-5.8s-ITS2), 18S rDNA, and large subunit (LSU) rDNA were also carried out. Read More

View Article and Full-Text PDF

Cytogenetic analysis of and : relevance of cytotaxonomic markers in the Anostomidae family (Characiformes).

Comp Cytogenet 2021 10;15(1):65-76. Epub 2021 Mar 10.

Departamento de Biologia Animal, Universidade Federal de Viçosa, Av. P. H. Rolfs, s/n, Centro, Viçosa, 36570-900, Minas Gerais, Brazil.

Recent phylogenetic hypotheses within Anostomidae, based on morphological and molecular data, resulted in the description of new genera ( Ramirez, Birindelli et Galetti, 2017) and the synonymization of others, such as the reallocation of Steindachner, 1875 and Eigenmann, 1907 to Borodin, 1929. Despite high levels of conservatism of the chromosomal macrostructure in this family, species groups have been corroborated using banding patterns and the presence of different sex chromosome systems. Due to the absence of cytogenetic studies in (Steindachner, 1875) and (Eigenmann, 1907), the goal of this study was to characterize their karyotypes and investigate the presence/absence of sex chromosome systems using different repetitive DNA probes. Read More

View Article and Full-Text PDF

Taxonomy and phylogeny of Koinocystididae (Platyhelminthes, Kalyptorhynchia), with the description of three new genera and twelve new species.

Zootaxa 2021 Mar 23;4948(4):zootaxa.4948.4.1. Epub 2021 Mar 23.

Universidad de Oriente, Biology Geography Department, Ave. Patricio Lumumba s/n, CP 90500, Santiago de Cuba, Cuba. Hasselt University, Centre for Environmental Sciences, Research Group Zoology: Biodiversity and Toxicology, Universitaire Campus Gebouw D, B-3590 Diepenbeek, Belgium.

The taxon Koinocystididae is the third most species-rich family within Eukalyptorhynchia. However, its diversity and phylogeny have been largely neglected in former studies. We introduce three new genera and twelve new species of Koinocystididae including Simplexcystis asymmetrica gen. Read More

View Article and Full-Text PDF

Phylogenetic position of two Macrobiotus species with a revisional note on Macrobiotus sottilei Pilato, Kiosya, Lisi amp; Sabella, 2012 (Tardigrada: Eutardigrada: Macrobiotidae).

Zootaxa 2021 Feb 18;4933(1):zootaxa.4933.1.5. Epub 2021 Feb 18.

School of Biology, V. N. Karazin Kharkiv National University, Svobody Sq., 4, 61022, Kharkiv, Ukraine.

In a moss and lichen sample collected on the Polish coast, a new population of Macrobiotus sottilei was found. Given that the original description of M. sottilei was based solely on the morphology observed under light microscopy and measurements of a few individuals, we provide, by means of integrative taxonomy, a revisional note on this species. Read More

View Article and Full-Text PDF
February 2021

A new macromedusa from the coast of Mozambique: Aurelia mozambica sp. nov. (Scyphozoa: Ulmaridae).

Zootaxa 2021 Feb 19;4933(2):zootaxa.4933.2.5. Epub 2021 Feb 19.

Department of Biodiversity and Conservation Biology, University of the Western Cape, Private Bag X17, Bellville 7535, South Africa.

A new species of the cosmopolitan jellyfish genus Aurelia is described from the coastal waters of Mozambique using a combination of morphological, meristic and genetic information (COI and 18S). The species can be separated from congeners that have been recently described by a combination of bell shape, number of canal origins and anastomoses, and the shape of the manubrium and oral arms. Three types of nematocysts are present in the tissues of both the bell margin and oral arms, and this description of the cnidome will allow for future comparison. Read More

View Article and Full-Text PDF
February 2021

An integrative description of a new Cephalothrix species (Nemertea: Palaeonemertea) from the South China Sea.

Zootaxa 2021 Jan 18;4908(4):zootaxa.4908.4.10. Epub 2021 Jan 18.

A.V. Zhirmunsky National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, Palchevskogo Street 17, Vladivostok 690041, Russia.

A new nemertean species of the genus Cephalothrix from intertidal calcareous red algae off the Vietnam coast is described based on histological sections, confocal laser scanning microscopy, and nucleotide sequences of three nuclear (18S rRNA, 28S rRNA, H3) and two mitochondrial (COI, 16S rRNA) DNA fragments. Cephalothrix suni sp. nov. Read More

View Article and Full-Text PDF
January 2021

Hidden diversity of the most basal tapeworms (Cestoda, Gyrocotylidea), the enigmatic parasites of holocephalans (Chimaeriformes).

Sci Rep 2021 Mar 9;11(1):5492. Epub 2021 Mar 9.

Institute of Parasitology, Slovak Academy of Sciences, Košice, Slovak Republic.

Gyrocotylideans are evolutionary ancient parasitic flatworms, and like their hosts-a relict group of holocephalan fishes (Chimaeriformes)-they are considered to be "living fossils" of a vanished past. However, the species diversity, host associations and biogeography of these most basal tapeworms are poorly known. Herein, we provide evidence of a conspicuous contrast between the genetic and morphological data based on an examination of newly collected and properly processed Gyrocotyle specimens (hologenophores) isolated from holocephalans off Taiwan and Argentina. Read More

View Article and Full-Text PDF

Cytogenetic Analysis of Panaqolus tankei Cramer & Sousa, 2016 (Siluriformes, Loricariidae), an Ornamental Fish Endemic to Xingu River, Brazil.

Cytogenet Genome Res 2021 Mar 19:1-8. Epub 2021 Mar 19.

Laboratório de Genética Animal, Instituto Nacional de Pesquisas da Amazônia, Coordenação de Biodiversidade, Manaus, Brazil.

Despite conservation of the diploid number, a huge diversity in karyotype formulae is found in the Ancistrini tribe (Loricariidae, Hypostominae). However, the lack of cytogenetic data for many groups impairs a comprehensive understanding of the chromosomal relationships and the impact of chromosomal changes on their evolutionary history. Here, we present for the first time the karyotype of Panaqolus tankei Cramer & Sousa, 2016. Read More

View Article and Full-Text PDF

Description of a new species of Aplectana (Nematoda: Ascaridomorpha: Cosmocercidae) using an integrative approach and preliminary phylogenetic study of Cosmocercidae and related taxa.

Parasit Vectors 2021 Mar 18;14(1):165. Epub 2021 Mar 18.

Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology of Hebei Province, College of Life Sciences, Hebei Normal University, 20 East Road of 2nd South Ring, Yuhua District, 050024, Shijiazhuang, Hebei Province, People's Republic of China.

Background: Nematodes of the family Cosmocercidae (Ascaridomorpha: Cosmocercoidea) are mainly parasitic in the digestive tract of various amphibians and reptiles worldwide. However, our knowledge of the molecular phylogeny of the Cosmocercidae is still far from comprehensive. The phylogenetic relationships between Cosmocercidae and the other two families, Atractidae and Kathlaniidae, in the superfamily Cosmocercoidea are still under debate. Read More

View Article and Full-Text PDF

A Review of the Parasite Fauna of the Black-Bellied Pangolin, Phataginus tetradactyla LIN. (Manidae), From Central Africa with the Description of Intraproboscis sanghae n. gen., n. sp. (Acanthocephala: Gigantorhynchidae).

J Parasitol 2021 Mar;107(2):222-238

Institute of Parasitology, Vetsuisse Faculty, University of Bern, Länggassstrasse 122, CH-3012 Bern, Switzerland.

A new archiacanthocephalan in the family Gigantorhynchidae, Intraproboscis sanghae n. gen., n. Read More

View Article and Full-Text PDF

Molecular phylogenetic study in Spirocercidae (Nematoda) with description of a new species Spirobakerus sagittalis sp. nov. in wild canid Cerdocyon thous from Brazil.

Parasitol Res 2021 May 11;120(5):1713-1725. Epub 2021 Mar 11.

Laboratório de Biologia e Parasitologia de Mamíferos Silvestres Reservatórios, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Avenida Brasil, 4365 Manguinhos, Rio de Janeiro, RJ, CEP 21045-900, Brazil.

The nematode family Spirocercidae Chitwood and Wehr, 1932, comprises three subfamilies, Spirocercinae Chitwood and Wehr, 1932; Ascaropsinae Alicata and McIntosh, 1933; and Mastophorinae Quentin, 1970, which occur worldwide. Spirocercids infect canids and can cause severe illness. The crab-eating fox, Cerdocyon thous (Linnaeus, 1766), is a canid that inhabits most of South America, including Brazil and is a host for several parasitic worms, in particular, nematodes. Read More

View Article and Full-Text PDF

Urocleidus sayani n. sp. (Monogenea: Dactylogyridae) from Gills of Pirate Perch (Aphredoderus sayanus).

J Parasitol 2021 Mar;107(2):214-221

9717 Wild Mountain Drive, Sherwood, Arkansas 71754.

Urocleidus sayani n. sp. is described from the gills of pirate perch (Aphredoderus sayanus) in the Wisconsin backwaters of the upper Mississippi River and was found in samples from the Southeastern United States. Read More

View Article and Full-Text PDF

Description of a New Species Hepatozoon quagliattus sp. nov. (Apicomplexa: Adeleorina: Hepatozoidae), infecting the Sleep Snake, Dipsas mikanii (Squamata: Colubridae: Dipsadinae) from Goiás State, Brazil.

Acta Parasitol 2021 Mar 8. Epub 2021 Mar 8.

Instituto de Biociências, Universidade Estadual Paulista UNESP, DBBVPZ, Setor de Parasitologia, Distrito de Ribeirão Junior, Botucatu, São Paulo, Brazil.

Purpose: Species of Hepatozoon Miller, 1908 (Hepatozoidae) are blood protozoans with a cosmopolitan distribution and are reported to parasitize a range of vertebrate hosts including mammals, birds, reptiles, and amphibians. The present study aimed to describe a new species of Hepatozoon (Apicomplexa: Adeleorina: Hepatozoidae) found infecting the sleep snake Dipsas mikanii (Schlegel, 1837) (Squamata: Colubridae: Dipsadinae).

Methods: The snake was collected in 2017 at the municipality of Britânia, Goiás State, Brazil. Read More

View Article and Full-Text PDF

Description and Molecular Differentiation of a New Skrjabinoptera (Nematode: Physalopteridae) from Eutropis macularia (Sauria: Scincidae) in North-Central Vietnam.

J Parasitol 2021 Mar;107(2):172-178

Department of Parasitology, Institute of Ecology and Biological Resources (IEBR), Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Vietnam.

Skrjabinoptera vietnamensis n. sp. is described from specimens recovered from the stomach of Eutropis macularia in north-central Vietnam. Read More

View Article and Full-Text PDF

Tardigrades of Kristianstads Vattenrike Biosphere Reserve with description of four new species from Sweden.

Sci Rep 2021 Mar 1;11(1):4861. Epub 2021 Mar 1.

Department of Environmental Science and Bioscience, Kristianstad University, 29188, Kristianstad, Sweden.

Kristianstads Vattenrike Biosphere Reserve [KVBR] is a UNESCO designated area of Sweden possessing high biological value. Although several studies on tardigrades inhabiting Sweden have been performed, the KVBR area has been neglected. The current study investigates the tardigrade fauna of five areas of the biosphere reserve and includes 34 samples of different substrates analysed quantitatively and qualitatively. Read More

View Article and Full-Text PDF

Morphology and molecular phylogeny of three Epistylis species found in freshwater habitats in China, including the description of E. foissneri n. sp. (Ciliophora, Peritrichia).

Eur J Protistol 2021 Apr 22;78:125767. Epub 2021 Jan 22.

Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao 266003, China; College of Fisheries, Ocean University of China, Qingdao 266003, China. Electronic address:

The peritrich genus Epistylis is speciose, however many species lack complete morphological description based on modern criteria and/or molecular data. In the present study, one new species, i.e. Read More

View Article and Full-Text PDF

The molecular profile of Acanthogyrus (Acanthosentis) kashmirensis from the Indian subcontinent.

Acta Parasitol 2021 Feb 20. Epub 2021 Feb 20.

Department of Biology, Brigham Young University, 1114 MLBM, Provo, UT, 84602, USA.

Purpose: The purpose of the present study was to provide molecular support for the validity of the morphological description of Acanthosentis kashmirensis Amin, Heckmann, Zargar, 2017 which was originally poorly described as Neoechinorhynchus kashmirensis Fotedar and Dar, 1977 from the Indian subcontinent, and to characterise its molecular identity and phylogenetic relationships.

Methods: Total DNA was extracted, and the partial region of the small subunit (SSU) 18S rDNA and ITS-rDNA genes were amplified and sequenced. Genetic diversity was calculated and phylogenetic analysis of the nucleotide sequence data was performed. Read More

View Article and Full-Text PDF
February 2021

Biogeography of the cosmopolitan terrestrial diatom Hantzschia amphioxys sensu lato based on molecular and morphological data.

Sci Rep 2021 Feb 19;11(1):4266. Epub 2021 Feb 19.

К.A. Timiryazev Institute of Plant Physiology RAS, IPP RAS, Moscow, Russia, 127276.

Until now, the reported diversity of representatives from the genus Hantzschia inhabiting soils from different parts of Eurasia was limited to the few species H. amphioxys, H. elongata and H. Read More

View Article and Full-Text PDF
February 2021

Erection of a New Genus and Species for the Pathogen of Hard Clams 'Quahog Parasite Unknown' (QPX): Mucochytrium quahogii gen. nov., sp. nov.

Protist 2021 02 29;172(1):125793. Epub 2021 Jan 29.

School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY 11794-5000, USA. Electronic address:

Quahog Parasite Unknown (QPX) is a facultative parasite of the hard clam, Mercenaria mercenaria. Although it has been observed in clams since the 1960's and cultivated since the 1990's, conflicting reports on important aspects of its biology have prevented its formal description. 18S rRNA gene sequences identify QPX as a thraustochytrid, but its production of copious mucus is atypical for this group. Read More

View Article and Full-Text PDF
February 2021

Description and Molecular Differentiation of a New Falcaustra (Nematode: Kathlaniidae) from the Indochinese Water Dragon, Physignathus cocincinus (Squamata: Agamidae) in North-central Vietnam.

J Parasitol 2021 01;107(1):98-107

Department of Parasitology, Institute of Ecology and Biological Resources (IEBR), Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Vietnam.

Falcaustra vietnamensis n. sp. is described from the small intestine of Physignathus cocincinus from north-central Vietnam. Read More

View Article and Full-Text PDF
January 2021

Differentiation spp. Isolates: RFLP of a Diagnostic PCR Amplicon Matches Sequence-Based Classification and Growth Temperature Preferences.

J Fungi (Basel) 2021 Feb 3;7(2). Epub 2021 Feb 3.

School of Life Sciences, Discipline of Microbiology, University of KwaZulu-Natal, Pietermaritzburg 3201, South Africa.

The genus , known since 1886, is primarily associated with reptiles and amphibians. Although globally distributed, rare infections caused by members of this genus mainly occur in tropical and subtropical regions. Morphological and physiological characteristics were used in the past for the description of species. Read More

View Article and Full-Text PDF
February 2021

Molecular and morphological description of the first (Apicomplexa: Hepatozoidae) species infecting a neotropical turtle, with an approach to its phylogenetic relationships.

Parasitology 2021 May 4;148(6):747-759. Epub 2021 Feb 4.

Facultad de Ciencias, Departamento de Biología, Universidad Nacional de Colombia, Sede Bogotá. Carrera 30 No. 45-03, Bogotá111321, Colombia.

Haemogregarines (Adeleorina) have a high prevalence in turtles. Nevertheless, there is only one Hepatozoon species described that infects Testudines so far; it is Hepatozoon fitzsimonsi which infects the African tortoise Kinixys belliana. Colombia harbours a great diversity of chelonians; however, most of them are threatened. Read More

View Article and Full-Text PDF

Exploring the relationship of and (Blattodea, Blattidae, Blattinae) from a morphological and molecular perspective, including a description of four new species.

PeerJ 2021 13;9:e10618. Epub 2021 Jan 13.

College of Plant Protection, Southwest University, Chongqing, Beibei, China.

This study utilized six genes (, , , , and ) from a total of 40 samples to construct maximum likelihood (ML) and Bayesian inference (BI) phylogenetic trees in order to infer the relationships between the morphologically similar genera Stål, 1874 and Bey-Bienko, 1957. The phylogenetic analysis showed the two genera have a close relationship and were recovered as sister groups based on ML and BI analyses. Four new species are described among these samples, i. Read More

View Article and Full-Text PDF
January 2021

Redescription and molecular analysis of () Sarkar, 1953 (Acanthocephala: Quadrigyridae) in India.

J Helminthol 2021 Jan 28;95:e3. Epub 2021 Jan 28.

Molecular Taxonomy Laboratory, Department of Zoology, Chaudhary Charan Singh University, Meerut, UP250004, India.

Pallisentis (Pallisentis) nandai Sarkar, 1953 is a freshwater fish parasite restricted to the Indian subcontinent in the Ganga River and its tributaries. It was described from the leaffish, Nandus nandus (Hamilton) from the Ganga River delta at Calcutta. We recovered variant specimens from the same host species from the Ganga near its headwaters at Bijnor about 1500 km away. Read More

View Article and Full-Text PDF
January 2021